Uncategorized
- Health & Medicine
No Scope: CT scan works as well as colonoscopy
A computed tomography scan of the large intestine works as well as colonoscopy in detecting signs of colon cancer.
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- Humans
Nanotech bill gives field a boost
Congress has approved a nanotechnology act that commits $3.7 billion in funding over 4 years and calls for research on the societal, environmental, and ethical implications of this rapidly growing field.
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Plants, bats magnify neurotoxin in Guam
Researchers have found that the natural neurotoxin BMAA gets magnified as it rises through a food chain on Guam, a finding that strengthens a recent hypothesis that attempts to explain a spike in neurological disease on that island.
- Planetary Science
Martian sand ripples are taller than Earth’s
New data gathered by a Mars-orbiting probe suggest that large ripples found in sandy areas of the Red Planet are more than twice as tall as their terrestrial counterparts.
- Health & Medicine
Two markers may predict heart risk
Two proteins that play a role in inflammation may serve as indicators of a person's risk of heart disease and stroke.
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Tiny Bubbles
Microscopic vesicles shed by cells may help the AIDS virus, benefit cancer cells, and drive the immune response.
- Tech
Wings of Change
Inspired by the Wright brothers, who steered their first flyer by twisting its pliant wings, engineers are developing versatile and flexible flying machines expected to undergo radical shape changes in flight.
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19290
Unfortunately your article got something wrong in describing the reshaping of aircraft surfaces. It states, “The recently retired supersonic commercial transport, the Concorde, tilted its nose downward for subsonic flight.” This is not the (whole) truth because the reason for this reshaping was not to reduce air drag, but to achieve a far-better view of […]
- Humans
From the November 25, 1933, issue
STEEL TOWERS GO UP AND DOWN TO SPEED SURVEY OF COUNTRY Work on control surveys of the United States is being rapidly pushed forward under funds recently provided by the Public Works Administration to the U.S. Coast and Geodetic Survey. Although the immediate purpose is to provide employment to a great number of men, the […]
- Math
Fractal World
Created by Michael Frame, Benoit Mandelbrot, and Nial Neger of Yale University, these Web pages serve as a remarkably comprehensive source of information on fractal geometry. The site offers basic definitions, many illustrations, and lots of mathematical details. Topics include natural fractals and dimensions, iterated function systems, the complex Newton’s method, fractals in art and […]
- Earth
The Next MTBE: Contamination from fuel additives could spread
Several alternatives to the common gasoline additives methyl tert-butyl ether (MTBE) and ethanol could create environmental problems similar to those that MTBE has already caused.
